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302 lines
5.1 KiB
ArmAsm
302 lines
5.1 KiB
ArmAsm
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; game.s
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; BuGS
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;
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; Created by Jeremy Rand on 2020-06-10.
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;Copyright © 2020 Jeremy Rand. All rights reserved.
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;
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;
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; The actual game is a 30x30 grid of 8x8 tiles.
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; The GS can do 30 wide with 10 tiles to spare.
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; The GS can only do 25 tiles tall though. So,
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; the screen will be 30 wide pushed to the right-
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; most side. The left side will have the score,
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; count of lives and the high score. Rather than
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; having them at the top, running that info on
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; the side will give us more vertical height for
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; more on-screen action.
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case on
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mcopy game.macros
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keep game
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game start
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jsl setupScreen
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lda colourPalette
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jsl setColour
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ldx #$2003
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jsl mushroom1
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ldx #$200b
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jsl mushroom2
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ldx #$2013
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jsl mushroom3
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ldx #$201b
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jsl mushroom4
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ldx #$2023
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jsl poisonedMushroom1
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ldx #$202b
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jsl poisonedMushroom2
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ldx #$2033
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jsl poisonedMushroom3
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ldx #$203b
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jsl poisonedMushroom4
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ldx #$2043
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jsl letterA
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ldx #$204b
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jsl letterB
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ldx #$2053
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jsl letterC
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ldx #$205b
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jsl letterD
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ldx #$2063
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jsl letterE
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ldx #$206b
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jsl letterF
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ldx #$2073
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jsl letterG
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ldx #$207b
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jsl letterH
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ldx #$2083
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jsl letterI
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ldx #$208b
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jsl letterJ
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ldx #$2093
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jsl letterK
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ldx #$209b
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jsl letterL
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ldx #$2a03
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jsl letterM
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ldx #$2a0b
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jsl letterN
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ldx #$2a13
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jsl letterO
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ldx #$2a1b
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jsl letterP
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ldx #$2a23
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jsl letterQ
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ldx #$2a2b
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jsl letterR
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ldx #$2a33
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jsl letterS
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ldx #$2a3b
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jsl letterT
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ldx #$2a43
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jsl letterU
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ldx #$2a4b
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jsl letterV
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ldx #$2a53
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jsl letterW
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ldx #$2a5b
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jsl letterX
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ldx #$2a63
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jsl letterY
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ldx #$2a6b
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jsl letterZ
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ldx #$2a73
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jsl symbolC
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ldx #$2a7b
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jsl symbolP
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ldx #$2a83
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jsl symbolDot
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ldx #$2a8b
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jsl symbolColon
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ldx #$2a93
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jsl solid0
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ldx #$2a9b
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jsl solid1
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ldx #$3403
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jsl solid2
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ldx #$340b
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jsl solid3
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ldx #$3413
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jsl number0
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ldx #$341b
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jsl number1
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ldx #$3423
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jsl number2
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ldx #$342b
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jsl number3
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ldx #$3433
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jsl number4
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ldx #$343b
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jsl number5
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ldx #$3443
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jsl number6
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ldx #$344b
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jsl number7
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ldx #$3453
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jsl number8
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ldx #$345b
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jsl number9
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ldx #$3463
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jsl flea1
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ldx #$346b
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jsl flea2
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ldx #$3473
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jsl flea3
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ldx #$347b
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jsl flea4
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ldx #$3483
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jsl score300
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ldx #$348b
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jsl score600
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ldx #$3493
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jsl score900
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ldx #$3e0b
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jsl scorpion1
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ldx #$3e1b
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jsl scorpion1s
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ldx #$3e2b
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jsl scorpion2
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ldx #$3e3b
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jsl scorpion2s
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ldx #$3e4b
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jsl scorpion3
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ldx #$3e5b
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jsl scorpion3s
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ldx #$3e6b
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jsl scorpion4
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ldx #$3e7b
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jsl scorpion4s
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jsl waitForKey
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rtl
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setupScreen entry
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short i,m
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lda $e0c035 ; Enable shadowing of SHR
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and #$f7
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sta $e0c035
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lda #$a1
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sta $e0c029 ; Enable SHR mode
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long i,m
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sei
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phd
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tsc
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sta backupStack
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lda $e1c068 ; Direct Page and Stack in Bank 01/
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ora #$0030
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sta $e1c068
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ldx #$0000
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lda #$9dfe
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tcs
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ldy #$7e00
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nextWord anop
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phx
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dey
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dey
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bpl nextWord
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lda $e1c068
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and #$ffcf
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sta $e1c068
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lda backupStack
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tcs
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pld
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cli
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rtl
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waitForKey entry
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loop2 short i,m
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loop1 anop
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lda $e0c000
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bpl loop1
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sta $e0c010
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long i,m
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and #$007f
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cmp #$0051
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beq quit
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cmp #$0071
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beq quit
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cmp #$001b
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beq quit
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lda colourPalette
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inc a
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cmp #$000e
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blt skip
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lda #$0000
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skip sta colourPalette
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jsl setColour
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bra loop2
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quit rtl
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backupStack dc i2'0'
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colourPalette dc i2'0'
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end
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